Werner's Theory Werner's theory proposes that the outer electronic structures of atoms are responsible for the bonding and properties of coordination compou...
Werner's Theory
Werner's theory proposes that the outer electronic structures of atoms are responsible for the bonding and properties of coordination compounds. According to this theory, atoms with higher atomic numbers tend to have more valence electrons, which are the electrons in the outermost energy level. These valence electrons can participate in bonding with atoms of other elements, forming covalent bonds.
IUPAC Nomenclature
The IUPAC (International Union of Pure Chemistry) nomenclature system is a standardized system for naming coordination compounds. The name of a coordination compound follows a set of rules that dictate the order in which the ligands are named. The ligands are the molecules or ions that surround the metal ion.
The metal ion is named first, followed by the ligands in alphabetical order.
Ligands that are monodentate are named before those that are polydentate.
The ligands are named according to their molecular formula.
The prefixes "dia-" or "tetra-" are used to indicate the number of ligands bonded to the metal ion.
The suffix "-ate" is used to indicate the oxidation state of the metal ion.
For example, the compound Fe(II)Cl6 can be named as iron(II) chloride or ferric chloride. The compound Co(NO3)4 can be named as cobalt(IV) nitrate or cobalt(II) nitrate